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spi: pxa2xx: Make LPSS SPI general register optional

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General register located in LPSS SPI private register space is not found in
upcoming Intel LPSS platforms. Access it conditionally depending is it
defined in configuration.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jarkko Nikula 2015-06-04 16:55:12 +03:00 committed by Mark Brown
parent dccf736965
commit 82ba2c2ab3
1 changed files with 7 additions and 3 deletions
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10
drivers/spi/spi-pxa2xx.c
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@ -245,9 +245,13 @@ static void lpss_ssp_setup(struct driver_data *drv_data)
if (drv_data->master_info->enable_dma) {
__lpss_ssp_write_priv(drv_data, config->reg_ssp, 1);
value = __lpss_ssp_read_priv(drv_data, config->reg_general);
value |= GENERAL_REG_RXTO_HOLDOFF_DISABLE;
__lpss_ssp_write_priv(drv_data, config->reg_general, value);
if (config->reg_general >= 0) {
value = __lpss_ssp_read_priv(drv_data,
config->reg_general);
value |= GENERAL_REG_RXTO_HOLDOFF_DISABLE;
__lpss_ssp_write_priv(drv_data,
config->reg_general, value);
}
}
}